package com.cn.design.adapter.classes;

/**
 * @author: zhangyiting
 * @description:
 * @createDate: Created in 2022/7/7 22:22
 * @version: 1.0
 */
public class Computer {
    public String readSD(SDCard sdCard) {
        if(sdCard == null) {
            throw new NullPointerException("sd card null");
        }
        return sdCard.readSD();
    }

}
